JPS5941938A - Automatic setting system of transmission speed - Google Patents
Automatic setting system of transmission speedInfo
- Publication number
- JPS5941938A JPS5941938A JP57150774A JP15077482A JPS5941938A JP S5941938 A JPS5941938 A JP S5941938A JP 57150774 A JP57150774 A JP 57150774A JP 15077482 A JP15077482 A JP 15077482A JP S5941938 A JPS5941938 A JP S5941938A
- Authority
- JP
- Japan
- Prior art keywords
- transmission speed
- communication
- station device
- switching
- master station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1438—Negotiation of transmission parameters prior to communication
- H04L5/1446—Negotiation of transmission parameters prior to communication of transmission speed
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Description
【発明の詳細な説明】
発明の対象
本発明は装置間の通信制御に関し、特に、複数種類の伝
送速度が定義された装置間において、主局装置側の伝送
速度の切替えに追従して、従局装置側の伝送速度を自動
的に設定する方式に関する。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The present invention relates to communication control between devices, and in particular, between devices in which a plurality of types of transmission speeds are defined, the slave station is controlled by following the switching of the transmission speed on the master station device side. This invention relates to a method for automatically setting the transmission speed on the device side.
従来技術
装置間の通信において、必要に応じて伝送速度を切替え
られる様にしている従来の方式は、あらかじめ２つの伝
送速度を決めておき、必要に応じ両装置ともスイッチ等
のマニュアル操作により、同時にもう一方の伝送速度に
切り替え、新たな伝送速度で通信を再開するというもの
である。この方式は、マニュアル操作が必要であること
、伝送速度の切替えに先立って電話連絡が必要である等
の欠点があった。Conventional technology In communication between devices, the conventional method allows the transmission speed to be switched as needed. Two transmission speeds are determined in advance, and if necessary, both devices can be switched simultaneously by manual operation of a switch, etc. The system switches to the other transmission speed and resumes communication at the new transmission speed. This method has drawbacks such as requiring manual operation and requiring telephone contact prior to switching the transmission speed.
発明の目的
本発明の目的は、前記の如き従来技術の欠点を解消する
ために、主局装置側に追従させて従局装置側の伝送速度
を自動的に切替え設定する方式を提供することにある。OBJECTS OF THE INVENTION An object of the present invention is to provide a system for automatically switching and setting the transmission speed on the slave station side by following the master station side, in order to eliminate the drawbacks of the prior art as described above. .
装置間の通信における伝送速度が複数とり得るとしても
、一方の装置が伝送速度を固定にして（・る間に他方の
装置側で伝送速度を順次切替えて通信を試みれば、回線
系が正常な場合、必ずいずれかの伝送速度で通信が６ｆ
能になるはずである。本発明はこの点に着目し、人手を
介さずに目動的に伝送速度の切替えを可能にしたもので
ある。Even if multiple transmission speeds are possible for communication between devices, if one device fixes the transmission speed while the other device sequentially switches the transmission speed and attempts communication, the line system will be normal. In this case, the communication must be 6f at one of the transmission speeds.
It should be possible. The present invention focuses on this point and makes it possible to switch the transmission speed manually without human intervention.
しかして本発明は、従局装置側で、主局装置との正常な
通信が不ロＪ能となった場合、該従局装置内部に設けら
れた伝送速度自動切替え手段によって伝送速度を自動的
に切替えてから該主局装置との通信を試み、該主局装置
との正常な通信がｏｆ能となるまで該従局装置に：Ｉｄ
いて同様の伝送速度の切替えと通信の試行を繰り返すこ
とにより、該従局装置側の伝送速度を該主局装置側と同
じ伝送速度に自動的に設定することを特徴とするもので
ある。However, in the present invention, when normal communication with the master station device is disabled on the slave station side, the transmission speed is automatically switched by the transmission speed automatic switching means provided inside the slave station device. After that, attempts to communicate with the master station device, and sends the :Id to the slave station device until normal communication with the master station device is turned off.
This is characterized in that the transmission speed on the slave station device side is automatically set to the same transmission speed as on the master station device side by repeating similar transmission rate switching and communication trials.
以下、図面を参照しながら、本発明の一実施例について
説明する。An embodiment of the present invention will be described below with reference to the drawings.
発明の実施例
第１図において、１と２は通信回線３を通じて通信する
装置である。いずれの装置１．２も、主制御部４，４′
と通信制御部５，５′を主要構成要素として備える点は
従来と同様であるが、さらに、主制御部４，４′の制御
の下に伝送速度を自動的（二切り賛える伝送速度切替機
構６，６′を備えている。Embodiment of the Invention In FIG. 1, 1 and 2 are devices that communicate through a communication line 3. In FIG. Both devices 1.2 have main control units 4, 4'
It is the same as the conventional system in that it includes a communication controller 5, 5' as a main component, but it also has an automatic transmission speed switching function under the control of the main controller 4, 4'. It is equipped with mechanisms 6 and 6'.
なお、ここでは、伝送速度を１９，２ ＫＢＰＳ、 ９
．６ＫＢＰＳ、４８ＫＢＰＳ、２．６ＫＢＰＳの４段階
に切替え可能とする。In addition, here, the transmission speed is 19.2 KBPS, 9
．． It is possible to switch between 4 stages: 6KBPS, 48KBPS, and 2.6KBPS.
今、装置ｌを主局装置、装置２を従局装置として、１９
．２ＫＢＰｓの伝送速度で通信している途中で、何等の
事由で主局装置ｌが伝送速度を２．４ＫＵＰＳに切り替
えたとする。従局装置ｚ側の伝送速度は１９．２ＫＢＰ
ｓ、／）ままであるから、従局装置２は主局装置ｌから
のデータを正常に受信できなくなり、従局装［２の主制
御部４′は伝送速度の切替え処理を開始する。Now, if device l is the master station device and device 2 is the slave station device, 19
．． Assume that the main station device l switches the transmission rate to 2.4 KUPS for some reason while communicating at a transmission rate of 2 KBPs. The transmission speed on the slave station device z side is 19.2KBP
s, /), the slave station device 2 cannot normally receive data from the master station device l, and the main control unit 4' of the slave station device 2 starts the process of switching the transmission rate.
第２図は、その伝送速度切替え処理の流れ図である。FIG. 2 is a flowchart of the transmission rate switching process.
すなわち、主制御部４′の制御で伝送速度切替機構６′
により、現在の伝送速度１９．２ Ｋ Ｂ Ｐ Ｓから
その次の順位の伝送速度９．６ＫＢＰＳｔ二切り替える
（ステップ１０）。そして、その切替えた伝送速度で主
局装置ｌからのデータ受信を試み（ステップ１１）、正
常に受信できるかチェックする（ステップ１２）。これ
で正常に受信できれば、当該処理は正常路ｒし、その時
の伝送速度で以降の通信が行なわれる。That is, the transmission speed switching mechanism 6' is controlled by the main controller 4'.
Accordingly, the current transmission rate of 19.2 KBPS is switched to the next transmission rate of 9.6 KBPSt (step 10). Then, it attempts to receive data from the main station device l at the switched transmission speed (step 11), and checks whether data can be received normally (step 12). If the data can be received normally, the process will proceed normally and subsequent communication will be performed at the current transmission speed.
この例では、９．６ＫＢＰＳの伝送速度では正常にデー
タを受信できないので、ステップ１０に戻って、伝送速
度を次の順位の４．８ Ｋ Ｂ Ｐ Ｓに切り賛え、同
様（ニデータ受信を試みる。このよう（二して、従局装
置２の伝送速度が主局装ｆｉｌと同じ伝送速度に自動的
に設定される。In this example, data cannot be received normally at a transmission rate of 9.6 KBPS, so return to step 10, set the transmission rate to the next rank of 4.8 KBPS, and similarly (attempt to receive two data). In this way, the transmission speed of the slave station device 2 is automatically set to the same transmission speed as that of the main station device fil.
なお、ステップ１２かもステップ１０に戻る途中で、伝
送速度の切替えが一巡したかチェックする（ステップ１
３）。−巡した場合は、当該処理を異常終了する。例え
ば、この例で従局装置２の伝送速度を２．４ Ｋ Ｂ
Ｐ Ｓに切り賛えたのらのデータ受信の試行でも正常に
受信できなけれは、通信回線などの障害が考えられるの
で異常終了する。この異常終了の処理は本発明の要旨で
はないので、その説明は割愛する。In addition, on the way back to step 12 or step 10, check whether the transmission speed has been changed all the way (step 1).
3). - If the process is repeated, the process is abnormally terminated. For example, in this example, the transmission rate of slave device 2 is 2.4 KB.
If the data cannot be received normally even after attempting to receive data from the PS, there may be a problem with the communication line, and the process ends abnormally. Since this abnormal termination processing is not the gist of the present invention, its explanation will be omitted.
第２図の如き処理は、ノ１−ドウエアによっても、マイ
クロプログラミ／グ等のソフトウェア番＝よっても、公
知の技術で６易に実現できることは明らかである。した
がって、その処理の詳細な手順や、伝送速度切替機構の
詳細構成の呈示は割愛する。It is clear that the processing shown in FIG. 2 can be easily realized using known techniques, whether by hardware or software such as microprogramming. Therefore, the detailed procedure of the processing and the detailed configuration of the transmission rate switching mechanism will not be presented.
発明の効果
以上の説明から明らかなよう（二、本発明によｎは次の
ような効果が得られる。Effects of the Invention As is clear from the above explanation (2. The following effects can be obtained by the present invention.
（１）伝送速度の切替えに際し、係員（＝よる４４前の
電話連絡が不安となる。(1) When changing the transmission speed, I feel uneasy about contacting the staff by phone 44 days in advance.
（２１人手によってスイッチを操作する等のマニュアル
操作が不要となる。(21 Manual operations such as manually operating switches are no longer required.
（３） 切替える伝送速度に自由度を待たせることか
できる。(3) It is possible to have a degree of freedom in changing the transmission speed.
（４）伝送速度のダイナミックな切替えがｈ」能になる
。(4) Dynamic switching of transmission speed becomes possible.
各図は本発明の一実施例を説明するためのものであり、
第１図は装置間の接続と各装置の概略構成を示す図、第
２図は伝送速度の切替え処理の流れ図である。
■、２・・・装置、８・・・通信回腸、４，４′・・・
主制御部、５，５′・・・通信制御部、６，６′・・・
伝送速度切替機構。Each figure is for explaining one embodiment of the present invention,
FIG. 1 is a diagram showing connections between devices and a schematic configuration of each device, and FIG. 2 is a flow chart of transmission rate switching processing. ■, 2... Apparatus, 8... Communication ileum, 4, 4'...
Main control section, 5, 5'... Communication control section, 6, 6'...
Transmission speed switching mechanism.
Claims (1)
される装置（主局装置）との正常な通信が不可能となっ
た場合、該従局装置内部に設けた伝送速度の自動切替え
手段によって伝送速度を自動的に切り替えてから該主局
装置との通信を試み、該主局装置との正常な通信が可能
となるまで該従局装置側において同様の伝送速度の切替
えと通信の試行を繰り返すことにより、該従局装置側の
伝送速度を該従局装置側と同じ伝送速度に自動的に設定
することを特徴とする伝送速度の自動設定方式。If a device considered to be a slave station (l slave device) is unable to communicate normally with a device considered to be a master station (master station device), an automatic transmission speed switching means provided inside the slave device After automatically switching the transmission speed, an attempt is made to communicate with the master station device, and a similar transmission speed switching and communication attempt is made on the slave station side until normal communication with the master station device is possible. An automatic transmission rate setting method characterized in that, by repeating the repetition, the transmission rate on the slave station side is automatically set to the same transmission rate as that on the slave station side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57150774A JPS5941938A (en) | 1982-09-01 | 1982-09-01 | Automatic setting system of transmission speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57150774A JPS5941938A (en) | 1982-09-01 | 1982-09-01 | Automatic setting system of transmission speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5941938A true JPS5941938A (en) | 1984-03-08 |
Family
ID=15504123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57150774A Pending JPS5941938A (en) | 1982-09-01 | 1982-09-01 | Automatic setting system of transmission speed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5941938A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01131045A (en) * | 1987-11-13 | 1989-05-23 | Tokuyama Soda Co Ltd | Gypsum composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562762A (en) * | 1979-06-21 | 1981-01-13 | Fujitsu Ltd | Start-stop synchronous communication system |
-
1982
- 1982-09-01 JP JP57150774A patent/JPS5941938A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562762A (en) * | 1979-06-21 | 1981-01-13 | Fujitsu Ltd | Start-stop synchronous communication system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01131045A (en) * | 1987-11-13 | 1989-05-23 | Tokuyama Soda Co Ltd | Gypsum composition |
| JPH0545541B2 (en) * | 1987-11-13 | 1993-07-09 | Tokuyama Soda Kk |
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